Prabhupada 0847 - Description of the Kali-yuga is Given in the Srimad-Bhagavatam.

10,000-year sub-period

A dialogue between Krishna and Ganga (goddess) found in the Brahma Vaivarta Purana describes that for the first 10,000 years of Kali Yuga, the ill effects of Kali Yuga will be reduced due to the presence of bhakti yogis and the ability to nullify sinful reactions, after which Earth will be devoid of devout religious people and be shackled by Kali Yuga.^[29]Gaudiya Vaishnavism believes this sub-period started later in Kali Yuga with the birth of Chaitanya Mahaprabhu (1486 CE).

https://en.wikipedia.org/wiki/Kali_Yuga